floccillation

from The Collaborative International Dictionary of English v.0.48

Floccillation \Floc`cil*la"tion\, n. [L. floccus a flock of
   wool. Cf. {Flock} of wool.] (Med.)
   A delirious picking of bedclothes by a sick person, as if to
   pick off flocks of wool; carphology; -- an alarming symptom
   in acute diseases. --Dunglison.
   [1913 Webster]